Bonding-pin.



L.S.BAGON.

BONDING PIN.

APPLICATION FILED 0013.27, 1905.

fimm Patented'June 14,1910.

" 53 Q? fly i'srnio'r or .iso. inninoi's. A. CORPORATION on rumors L lin CGLUMELII, ASSIGNQR TQ THE RAE! BGNDING-PIN.

.ianpliearion Uctobe' may My vein on relates in general to improvcinenisin c eciri'c connectors i unitingone or In relatively small @lcoillficoir dncto ':o a larger conductor, and more perliculerly to n hondin pinfor securing, {L plurality of Wires Within holes formed in the adjoiningrails railroad track.

in hondi a icrnii' ":ls O; th

connecied to "the mils throughout a Q l conhict requisite current i s onecessary ci-{y of the bond. should be erinit of die cursills and in rreqni t specity it i l e plursl'y of bonds been .igoining rails whichiviiin the .1

ordinary forms of bonding pins necessitcics in to connect a in hole andbonding each e io each An cct of my invention is to provide a bondingpin capable of readily receiving the of e conductor in such e manner asso form. an extcnded'contnct surface after the pin has been driven intoan opening ohrough the rail, thereby coincidently with the driving ofthe pin into the rail forming an electrical connection between theconductor and rail of the necessary capacity.

A further object of my invention is to provide a bonding pin adapted forsimulta neously connecting n plurality of small condu tors to s largerconduceor.

ii. further object of my invention is to provide a bonding pin 'WhiCllWill be inexpensive in manufacture, simple in opplicw tion and efficientin use.

My invention consists primarily in ii solid tapered honding pin having aplurality of channels in its surface each of which may z )1, is, haveinvenred inis ii is necessary that the bond should be closely and Ktheir surfaces to insure.

she pas' Snecificaiiou of Letters Za'tens.

Panic "l ed June Serial No. 284 rece've a small conducilor or uW ofwhich may receive a poron ofa single conductor.

My invention will be more fully described herein; her with reference tothe accompanying drziwing, in which the same is illusrraced as embodiedin several convenient and practical forms, and in whicln Figure 1 islongitudinal section through bonding pin embodying my invention;

2 an end elcvalionol view oi the bonding pin when from the left in 1;Fig.

'3. an end elevstional View taken from the righi in Fig. i; Fig. 21 planview of the bonding pin shoi'vn in Figs, 1., 2 and 3, a portion or". therail and the end of the pin when applied to the rsil being shown indotted linesylfig. a tinnsvcrscscction of a railroad rail showing a bondconnected iheretc hy 'ny improved bonding pin Figs.

(3 and 7 and elevations of modified forms of my bonding pin; and Fig. 8an clevational vieiv showing :1 connecting wire in position on fihemodified embodiment of my invcn' lion shown in Fig. 7

Siin l reference characters are used to indiczil i i *nilar parts in theseveral figures of the drawing.

Referring particularly to Figs. 1 to of the drawing, reference letter Alndicstesone form of my improved bonding pin. The pin is preferablytapered so as to be readily driven *ithin an openin in a railroad rail Bor other electrical conductor. Longitudinal grooves F1 and b are formedin the surface of the pin A, the depth of such grooves being preferablyslightly less than the diameter of the smaller conductor C which is tobe united t0 the larger conductor B. The grooves Z2" and b arepreferably arranged in diainetricsl opposite portions of the surface ofthe pin and are preferably uniied at the smaller end of the pin by atransverse groove 6 The groove 5 divides the smaller end of the pin soas to form two lugs o, a which may, if desired, be bent in o posiiedirections to form securing lugs a ter the pin has been driveninto theopening in the larger conductor which inthe present application of myinvention is shown as a railroad rail B. The end wall I) of groove 5 isconveniently rounded to form a seat for the bent portion of theconductor O as shown.

Fig. 6 illustrates a modified form of my by projecting ribs upon thesurface of the gin as shown in Figs. 7 and 8. In these gures A indicatesthe larger end of a bonding pin the surface of which is provided withpairs of parallel ribs a, a. located at such a-distance a art as to forma channel of a depth and wi th corresponding to the diameter of the wireor other small conductor C, C.

The application of my improved bonding pin is as follows: A smallconductor or wire G is placed within one of the longitudinal groovesofthe bonding pin and bent around the curved seat or end of the latter soas to be seated in the transverse groove b and to extend backwardly inthe longitudinal groove 6 When the small conductor has been properlyplaced around the bonding, pin the latter is driven into an 0 ening inthe larger conductor. \Vhen the arger conductor is a railroad rail theopenin is .preferably formed through the web 3 thereof. The lugs a, a,on either side of the groove 6 may then be bent in opposite" directions,as indicated in Fig. 4 to moresecurely retain the bonding pin inposition'within the opening in the rail web. It is of'course obviousthat instead of bending the wire C back upon itself after passing aroundthe'end of the pin, a'separate w1re may be placed in each of the groovesand both wires simultaneously united to the rail by driving the pinlintothe opening-therein.

In the formof ply invention shown in Fig. 6 one wire may be bent back soas to be seated in the opposite g'rooves 6, Z), while another wire maybe bent so as to be received within the opposite grooves Z) and b. Inthe form of my invention shown in this figure 'four wires maybe unitedtov the rail by inserting the ends of the wires in the respectivegrooves.

The application of the modification shown in Figs. 7 and 8 is similar tothat of the other embodiments of my invention, namely, the wireconductor is placed within the channel formed between a pair of the ribsa, a and is then bent around the end of the pin so that a portion 0thereof ext-ends between the outer pair of ribs a, a as clearlyillustrated in Fig. 8. l v

From the foregoing description "of my invention it will be observedthat'I have devised an improved bonding pin capable of simultaneouslyuniting a plurality of smaller conductors to a larger conductor whendriven into an opening in the larger conductor, or capable of forcingtwo portions of the same small conductor into close contact/with thesurface surrounding an opening in the larger conductor and therebyinsuring an extended electrical connection be tween the conductors. Byforming the pin solid and tapered, the act of driving the sameinto anopening in a larger conductor coincidently forces the smaller conductoror conductors into close electrical contact with the wall around theOpening in the larger conductor.

Having now fully described my invention, what I claim. as new and desireto secure by Letters Patent is:

1. A. bonding pin having a plurality of longitudinal grooves and atransverse groove across one end thereof and connecting the longitudinalgrooves together.

2. A bonding pin having a pair of grooves connected by a transversegroove across one end of the pin.

3. The combination with a relatively lar e conductor having an openingtherein, a bonc ing pin tightly engaglng the surface around the openinginthe large conductor and having connected channels extendinglongitudinallv thereof and across one end, and a small conductorpartially surrounding said pin and arranged in said channels.

4:. The combination with a relatively large conductor having anopen1ngtherein,a bonding pin driveninto said opening, said bonding inhaving channels extending longitudina ly on opposite sides thereof and aconnecting channel across one end, and a small conductor looped aboutsaid bonding pin and lying within said channels.

5. The combination with a relatively large conductor having an openingtherein, a tapered bpnding pin driven into said opening, said bondingpin having longitudinally extending channels on opposite sides thereofand a connecting channel across the smaller end, and a small conductorlooped about said pin and lying within said channels.

6. The combination with a relatively large conductor having an openingtherein, a bond: ing pin arranged to be driven into said opening, saidbondin pin having channels extending longitudinally on opposite sidesthereof, and a small conductor looped about said bonding pin lengthwisethereof and lying in said channels.

In testimony whereof, I sign this specification in the presence of twowitnesses.

LEVI s. BACON.

